Maths practice for 12-year-olds - page 252 of 351

Number of problems found: 7015

Clock hands
The second hand has a length of 1.5 cm. How long does the endpoint of this hand travel in one day?
Afternoon 5618
Mrs. Vránová planted 50 spruces in three and a half hours in the morning. Mrs. Kosová came in the afternoon, and together, they planted another 100 spruce trees in four and a half hours. Report: A. how long would it take Mrs. Kosová to plant 50 spruces he
Equilateral 5617
The flower bed in front of the house is an equilateral triangle with a side length of 2.5 m. Mom plants roses around it. How many rose bushes does mom need to plant if she plants the bushes at the same distance of 50 cm from each other?
Increase 5613
The tourist travels at an average speed of 3.5 km/h. The last train takes him 50 minutes. If he still has 5 km to go to the station, how much does he have to increase his speed?
Children 5612
The woman has two children, who will be 60 years old in four years. The children are the same age. How old are the children now?
Production 5609
The production plant fulfilled 1/4 of the monthly plan in the first 10 days of the month, 5/14 in the second decade, and 3/7 of the monthly plan in the remaining part of the month. Determine if the monthly plan has been met.
Improvement 5606
The material in the factory was originally enough for two workshops for 20 days. After using the improvement proposal, it was enough for 25 days. How many days are enough for 5 workshops now? How many days can these workshops work longer from the saved ma
Train delay
The train should be at the station for 10 minutes. It still has 32 km left. What is the expected delay if the train travels in 2 minutes 3 km except for the last section, 2 km in 5 minutes?
Unknown number
If I reduced the sum of 70 and the unknown number three times, I would get 100. What is the unknown number?
Remainder 5594
What number did we divide by 55 if the ratio is 9.16 and the remainder is 0.04?
Construct 5593
Construct an isosceles trapezoid, whose base is 6 cm long, the base forms an angle of 30 ° with the diagonal, and the arms are 4 cm long.
Something 5588
Honza receives pocket money and wants to buy something good with it. If he purchased four cakes, he would have CZK 5 left. If he wanted to buy five cakes, he would be 6 CZK short. If he had bought two pies and three doughnuts, he would have spent all his
Second 5586
The first pump fills the pool in 12 hours. The second pump fills it in 15 hours. If all three pumps work, the pool will fill in 4 hours. How long will it take to fill the pool with only the third pump?
Complete 5584
The two workers dug together for 6 hours. The first worker would do the work himself in 14 hours. How long would it take for the second worker to complete the task?
Thunder and lightning
There was a glimpse of the sky, and we heard thunder in 4.5 seconds. The light spreads at 300,000 kilometers per second, so we can assume the flash instantly without delay. However, the sound's speed is much lower in the air, one-third of a kilometer per
Czech flag
Calculate the areas of the colored parts on Czech flag in the shape of a rectangle with dimensions of 2m and 1m. White and red form half the width, the blue triangle is isosceles, and its apex is half the length.
Received 5578
Four boys passed the paper to harvest. John received 111 1/3 ducats, Michal 228 3/4, Peter 195 1/2 ducats, and Robert 146 1/4 ducats. How many kg of paper did each boy bring if they bought paper at 2.50 ducats per kg?
Equation 15
Solve equation with variables on both sides:
Contains 5566
100g of yogurt contains 150mg of calcium. How many kg of yogurt would we have to eat to meet the daily dose of calcium 1000mg?
Distance 5565
The tourist section covered 14.5 km in 2.5 hours. What distance did he cover on average per hour?

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